Issue 4, 2022

Influence of additives on the polymorphic manipulation of organic fluorescent crystals and its mechanism

Abstract

Development of polymorphism-dependent organic fluorescent crystals through polymorphic manipulation with additives could be a potential strategy for making new materials with different functions and properties. In this work, three polymorphs of an X-shaped tetrasubstituted molecule, 2,5-bis(5-methyl-2-thienyl) terephthalaldehyde, were successfully manipulated using additives. Distinct photophysical properties between Form I (530 nm) and Form II (570 nm) were observed, which could provide a potential method for intuitively observing the polymorphic transformation and nucleation of different polymorphic forms. With the incorporation of NMR titration, computational simulation and X-ray crystallographic analysis, the mechanism of additive-induced polymorphism was carefully investigated. Different crystallization experimental results suggest that additives could inhibit the formation of Form I while promoting the formation of Form II.

Graphical abstract: Influence of additives on the polymorphic manipulation of organic fluorescent crystals and its mechanism

Supplementary files

Article information

Article type
Paper
Submitted
24 Sep 2021
Accepted
18 Dec 2021
First published
20 Dec 2021

CrystEngComm, 2022,24, 854-862

Influence of additives on the polymorphic manipulation of organic fluorescent crystals and its mechanism

X. Zhang, J. Wang, F. Yu, X. Cheng, Y. Hao, Y. Liu, X. Huang, T. Wang and H. Hao, CrystEngComm, 2022, 24, 854 DOI: 10.1039/D1CE01285A

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